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Improved tau polarisation measurement
Authors :
Buskulic, D. Casper, D. Bonis, I. Decamp, D. Ghez, P. Goy, C. Lees, J. -P Minard, M. -N Odier, P. Pietrzyk, B. Ariztizabal, F. Chmeissani, M. Crespo, J. M. Efthymiopoulos, I. Fernandez, E. Fernandez-Bosman, M. Gaitan, V. Garrido, Ll Martinez, M. Orteu, S. Pacheco, A. Padilla, C. Palla, F. Pascual, A. Perlas, J. A. Sanchez, F. Teubert, F. Creanza, D. Palma, M. Farilla, A. Iaselli, G. Maggi, G. Marinelli, N. Natali, S. Nuzzo, S. Ranieri, A. Raso, G. Romano, F. Ruggieri, F. Selvaggi, G. Silvestris, L. Tempesta, P. Zito, G. Huang, X. Lin, J. Ouyang, Q. Wang, T. Xie, Y. Xu, R. Xue, S. Zhang, J. Zhang, L. Zhao, W. Bonvicini, G. Cattaneo, M. Comas, P. Coyle, P. Drevermann, H. Engelhardt, A. Forty, R. W. Frank, M. Girone, M. Hagelberg, R. Harvey, J. Jacobsen, R. Janot, P. Jost, B. Knobloch, J. Lehraus, I. Maggi, M. Markou, C. Martin, E. B. Mato, P. Meinhard, H. Minten, A. Miquel, R. Oest, T. Paolo Palazzi Pater, J. R. Perrodo, P. Pusztaszeri, J. -F Ranjard, F. Rensing, P. Rolandi, L. Schlatter, D. Schmelling, M. Schneider, O. Tejessy, W. Tomalin, I. R. Venturi, A. Wachsmuth, H. Wiedenmann, W. Wildish, T. Witzeling, W. Wotschack, J. Ajaltouni, Z. Bardadin-Otwinowska, M. Barres, A. Boyer, C. Falvard, A. Gay, P. Guicheney, C. Henrard, P. Jousset, J. Michel, B. Monteil, S. Montret, J. -C Pallin, D. Perret, P. Podlyski, F. Proriol, J. Rossignol, J. -M Saadi, F. Fearnley, T. Hansen, J. B. Hansen, J. D. Hansen, J. R. Hansen, P. H. Nilsson, B. S. Kyriakis, A. Simopoulou, E. Siotis, I. Vayaki, A. Zachariadou, K. Blondel, A. Bonneaud, G. Brient, J. C. Bourdon, P. Passalacqua, L. Rougé, A. Rumpf, M. Tanaka, R. Valassi, A. Verderi, M. Videau, H. Candlin, D. J. Parsons, M. I. Focardi, E. Parrini, G. Corden, M. Delfino, M. Georgiopoulos, C. Jaffe, D. E. Antonelli, A. Bencivenni, G. Bologna, G. Bossi, F. Campana, P. Capon, G. Cerutti, F. Chiarella, V. Felici, G. Laurelli, P. Mannocchi, G. Murtas, F. Murtas, G. P. Pepe-Altarelli, M. Dorris, S. J. Halley, A. W. Ten Have, I. Knowles, I. G. Lynch, J. G. Morton, W. T. O Shea, V. Raine, C. Reeves, P. Scarr, J. M. Smith, K. Smith, M. G. Thompson, A. S. Thompson, F. Thorn, S. Turnbull, R. M. Becker, U. Braun, O. Geweniger, C. Graefe, G. Hanke, P. Hepp, V. Kluge, E. E. Putzer, A. Rensch, B. Schmidt, M. Sommer, J. Stenzel, H. Tittel, K. Wunsch, M. Beuselinck, R. Binnie, D. M. Cameron, W. Colling, D. J. Dornan, P. J. Konstantinidis, N. Moneta, L. Moutoussi, A. Nash, J. San Martin, G. Sedgbeer, J. K. Stacey, A. M. Dissertori, G. Girtler, P. Kneringer, E. Kuhn, D. Rudolph, G. Bowdery, C. K. Brodbeck, T. J. Colrain, P. Crawford, G. Finch, A. J. Foster, F. Hughes, G. Sloan, T. Whelan, E. P. Williams, M. I. Galla, A. Greene, A. M. Kleinknecht, K. Quast, G. Raab, J. Renk, B. Sander, H. -G Wanke, R. Zeitnitz, C. Aubert, J. J. Bencheikh, A. M. Benchouk, C. Bonissent, A. Bujosa, G. Calvet, D. Carr, J. Diaconu, C. Etienne, F. Thulasidas, M. Nicod, D. Payre, P. Rousseau, D. Talby, M. Abt, I. Assmann, R. Bauer, C. Blum, W. Brown, D. Dietl, H. Dydak, F. Gotzhein, C. Jakobs, K. Kroha, H. Lütjens, G. Lutz, G. Männer, W. Moser, H. -G Richter, R. Rosado-Schlosser, A. Schwarz, A. S. Settles, R. Seywerd, H. Stierlin, U. St Denis, R. Wolf, G. Alemany, R. Boucrot, J. Callot, O. Cordier, A. Courault, F. Davier, M. Duflot, L. Grivaz, J. -F Heusse, Ph Jacquet, M. Kim, D. W. Le Diberder, F. Lefrançois, J. Lutz, A. -M Musolino, G. Nikolic, I. Park, H. J. Park, I. C. Schune, M. -H Simion, S. Veillet, J. -J Videau, I. Azzurri, P. Abbaneo, D. Bagliesi, G. Batignani, G. Bettarini, S. Bozzi, C. Calderini, G. Carpinelli, M. Ciocci, M. A. Ciulli, V. Orso, R. Ferrante, I. Foà, L. Forti, F. Giassi, A. Giorgi, M. A. Gregorio, A. Ligabue, F. Lusiani, A. Marrocchesi, P. S. Messineo, A. Rizzo, G. Sanguinetti, G. Sciabà, A. Spagnolo, P. Steinberger, J. Tenchini, R. Tonelli, G. Triggiani, G. Vannini, C. Verdini, P. G. Walsh, J. Betteridge, A. P. Blair, G. A. Bryant, L. M. Gao, Y. Green, M. G. Johnson, D. L. Medcalf, T. Mir, Ll M. Strong, J. A. Bertin, V. Botterill, D. R. Clifft, R. W. Edgecock, T. R. Haywood, S. Edwards, M. Maley, P. Norton, P. R. Thompson, J. C. Bloch-Devaux, B. Colas, P. Duarte, H. Emery, S. Kozanecki, W. Lançon, E. Lemaire, M. C. Locci, E. Marx, B. Perez, P. Rander, J. Renardy, J. -F Rosowsky, A. Roussarie, A. Schuller, J. -P Schwindling, J. Si Mohand, D. Trabelsi, A. Vallage, B. Johnson, R. P. Litke, A. M. Taylor, G. Wear, J. Beddall, A. Booth, C. N. Boswell, R. Cartwright, S. Combley, F. Dawson, I. Koksal, A. Letho, M. Newton, W. M. Rankin, C. Thompson, L. F. Böhrer, A. Brandt, S. Cowan, G. Feigl, E. Grupen, C. Lutters, G. Minguet-Rodriguez, J. Rivera, F. Saraiva, P. Smolik, L. Stephan, F. Bosisio, L. Della Marina, R. Ganis, G. Giannini, G. Gobbo, B. Pitis, L. Ragusa, F. Kim, H. Rothberg, J. Wasserbaech, S. Armstrong, S. R. Bellantoni, L. Elmer, P. Feng, Z. Ferguson, D. P. S. Gao, Y. S. González, S. Grahl, J. Harton, J. L. Hayes, O. J. Hu, H. Mcnamara Iii, P. A. Nachtman, J. M. Orejudos, W. Pan, Y. B. Saadi, Y. Schmitt, M. Scott, I. J. Sharma, V. Turk, J. D. Walsh, A. M. Weber, F. V. Wu, S. L. Wu, X. Yamartino, J. M. Zheng, M. Zobernig, G. Buskulic, D Casper, D Debonis, I Decamp, D Ghez, P Goy, C Lees, J Minard, M Odier, P Pietrzyk, B Ariztizabal, F Chmeissani, M Crespo, J Efthymiopoulos, I Fernandez, E Fernandezbosman, M Gaitan, V Garrido, L Martinez, M Orteu, S Pacheco, A Padilla, C Palla, F Pascual, A Perlas, J Sanchez, F Teubert, F Creanza, D Depalma, M Farilla, A Iaselli, G Maggi, G Marinelli, N Natali, S Nuzzo, S Ranieri, A Raso, G Romano, F Ruggieri, F Selvaggi, G Silvestris, L Tempesta, P Zito, G Huang, X Lin, J Ouyang, Q Wang, T Xie, Y Xu, R Xue, S Zhang, J Zhang, L Zhao, W Bonvicini, G Cattaneo, M Comas, P Coyle, P Drevermann, H Engelhardt, A Forty, R Frank, M Girone, M Hagelberg, R Harvey, J Jacobsen, R Janot, P Jost, B Knobloch, J Lehraus, I Maggi, M Markou, C Martin, E Mato, P Meinhard, H Minten, A Miquel, R Oest, T Palazzi, P Pater, J Perrodo, P Pusztaszeri, J Ranjard, F Rensing, P Rolandi, L Schlatter, D Schmelling, M Schneider, O Tejessy, W Tomalin, I Venturi, A Wachsmuth, H Wiedenmann, W Wildish, T Witzeling, W Wotschack, J Ajaltouni, Z Bardadinotwinowska, M Barres, A Boyer, C Falvard, A Gay, P Guicheney, C Henrard, P Jousset, J Michel, B Monteil, S Montret, J Pallin, D Perret, P Podlyski, F Proriol, J Rossignol, J Saadi, F Fearnley, T Hansen, J Hansen, P Nilsson, B Kyriakis, A Simopoulou, E Siotis, I Vayaki, A Zachariadou, K Blondel, A Bonneaud, G Brient, J Bourdon, P Passalacqua, L Rouge, A Rumpf, M Tanaka, R Valassi, A Verderi, M Videau, H Candlin, D Parsons, M Focardi, E Parrini, G Corden, M Delfino, M Georgiopoulos, C Jaffe, D Antonelli, A Bencivenni, G Bologna, G Bossi, F Campana, P Capon, G Cerutti, F Chiarella, V Felici, G Laurelli, P Mannocchi, G Murtas, F Murtas, G Pepealtarelli, M Dorris, S Halley, A Tenhave, I Knowles, I Lynch, J Morton, W Oshea, V Raine, C Reeves, P Scarr, J Smith, K Smith, M Thompson, A Thompson, F Thorn, S Turnbull, R Becker, U Braun, O Geweniger, C Graefe, G Hanke, P Hepp, V Kluge, E Putzer, A Rensch, B Schmidt, M Sommer, J Stenzel, H Tittel, K Wunsch, M Beuselinck, R Binnie, D Cameron, W Colling, D Dornan, P Konstantinidis, N Moneta, L Moutoussi, A Nash, J Sanmartin, G Sedgbeer, J Stacey, A Dissertori, G Girtler, P Kneringer, E Kuhn, D Rudolph, G Bowdery, C Brodbeck, T Colrain, P Crawford, G Finch, A Foster, F Hughes, G Sloan, T Whelan, E Williams, M Galla, A Greene, A Kleinknecht, K Quast, G Raab, J Renk, B Sander, H Wanke, R Zeitnitz, C Aubert, J Bencheikh, A Benchouk, C Bonissent, A Bujosa, G Calvet, D Carr, J Diaconu, C Etienne, F Thulasidas, M Nicod, D Payre, P Rousseau, D Talby, M Abt, I Assmann, R Bauer, C Blum, W Brown, D Dietl, H Dydak, F Gotzhein, C Jakobs, K Kroha, H Lutjens, G Lutz, G Manner, W Moser, H Richter, R Rosadoschlosser, A Schwarz, A Settles, R Seywerd, H Stierlin, U Denis, R Wolf, G Alemany, R Boucrot, J Callot, O Cordier, A Courault, F Davier, M Duflot, L Grivaz, J Heusse, P Jacquet, M Kim, D Lediberder, F Lefrancois, J Lutz, A Musolino, G Nikolic, I Park, H Park, I Schune, M Simion, S Veillet, J Videau, I Azzurri, P Abbaneo, D Bagliesi, G Batignani, G Bettarini, S Bozzi, C Calderini, G Carpinelli, M Ciocci, M Ciulli, V Dellorso, R Ferrante, I Foa, L Forti, F Giassi, A Giorgi, M Gregorio, A Ligabue, F Lusiani, A Marrocchesi, P Messineo, A Rizzo, G Sanguinetti, G Sciaba, A Spagnolo, P Steinberger, J Tenchini, R Tonelli, G Triggiani, G Vannini, C Verdini, P Walsh, J Betteridge, A Blair, G Bryant, L Gao, Y Green, M Johnson, D Medcalf, T Mir, L Strong, J Bertin, V Botterill, D Clifft, R Edgecock, T Haywood, S Edwards, M Maley, P Norton, P Thompson, J Blochdevaux, B Colas, P Duarte, H Emery, S Kozanecki, W Lancon, E Lemaire, M Locci, E Marx, B Perez, P Rander, J Renardy, J Rosowsky, A Roussarie, A Schuller, J Schwindling, J Mohand, D Trabelsi, A Vallage, B Johnson, R Litke, A Taylor, G Wear, J Beddall, A Booth, C Boswell, R Cartwright, S Combley, F Dawson, I Koksal, A Letho, M Newton, W Rankin, C Thompson, L Bohrer, A Brandt, S Cowan, G Feigl, E Grupen, C Lutters, G Minguetrodriguez, J Rivera, F Saraiva, P Smolik, L Stephan, F Bosisio, I Dellamarina, R Ganis, G Giannini, G Gobbi, B Pitis, L Ragusa, F Kim, H Rothberg, J Wasserbaech, S Armstrong, S Bellantoni, L Elmer, P Feng, Z Ferguson, D Gonzalez, S Grahl, J Harton, J Hayes, O Hu, H Mcnamara, P Nachtman, J Orejudos, W Pan, Y Saadi, Y Schmitt, M Scott, I Sharma, V Turk, J Walsh, A Weber, F Wu, S Wu, X Yamartino, J Zheng, M Zobernig, G Laboratoire d'Annecy de Physique des Particules (LAPP) Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC) Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) Laboratoire Leprince-Ringuet (LLR) Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS) Centre de Physique des Particules de Marseille (CPPM) Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) ALEPH Lees, Jp Minard, Mn Crespo, Jm Perlas, Ja Forty, Rw Martin, Eb Pater, Jr Pusztaszeri, Jf Rolandi, Luigi Tomalin, Ir Montret, Jc Rossignol, Jm Hansen, Jb Hansen, Jd Hansen, Jr Hansen, Ph Brient, Jc Candlin, Dj Parsons, Mi Jaffe, De Murtas, Gp Dorris, Sj Halley, Aw Knowles, Ig Lynch, Jg Morton, Wt Scarr, Jm Smith, Mg Turnbull, Rm Kluge, Ee Binnie, Dm Colling, Dj Dornan, Pj Sedgbeer, Jk Stacey, Am Bowdery, Ck Brodbeck, Tj Finch, Aj Whelan, Ep Williams, Mi Greene, Am Sander, Hg Aubert, Jj Bencheikh, Am Moser, Hg Grivaz, Jf Kim, Dw Lutz, Am Park, Hj Park, Ic Schune, Mh Veillet, Jj Ciocci, Ma Giorgi, Ma Ligabue, Franco Lusiani, Alberto Verdini, Pg Betteridge, Ap Blair, Ga Bryant, Lm Green, Mg Johnson, Dl Mir, Lm Strong, Ja Botterill, Dr Clifft, Rw Edgecock, Tr Norton, Pr Thompson, Jc Lemaire, Mc Renardy, Jf Schuller, Jp Johnson, Rp Litke, Am Booth, Cn Newton, Wm Thompson, Lf Armstrong, Sr Ferguson, Dp Harton, Jl Hayes, Oj Mcnamara, Pa Nachtman, Jm Pan, Yb Scott, Ij Turk, Jd Walsh, Am Weber, Fv Wu, Sl Yamartino, Jm Zobernig, G. Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
Source :
Scopus-Elsevier, Zeitschrift für Physik C Particles and Fields, Zeitschrift für Physik C Particles and Fields, 1996, 69, pp.183-193, Zeitschrift für Physik C Particles and Fields, Springer Verlag, 1996, 69, pp.183-193
Abstract
Using 22 pb−1 of data collected at LEP in 1992 on the peak of the Z resonance, the ALEPH collaboration has measured the polarisation of the tau leptons decaying into $$ev\bar v, \mu v\bar v$$ ,πν, ρν and a1 ν from their individual decay product distributions. The measurement of the tau polarisation as a function of the production polar angle yields the two parametersN τ andN e, where, in terms of the axial and vector couplingsg Al andg Vl,N l=2g Vl gAl/(g Vl 2 +g 2 ). This analysis follows to a large extent the methods devised for the 1990 and 1991 data but with improvements which bring a better understanding of the systematic uncertainties. Combining the 1992 measurements with our previously published results yieldsN τ=0.136±0.012±0.009 andN e=0.129±0.016±0.005. Assuminge−τ universality, the measurements imply an effective weak mixing angle of sin 2 θ eff =0.2332±0.0014.
Details
ISSN :
01709739 and 14346052
Database :
OpenAIRE
Journal :
Scopus-Elsevier, Zeitschrift für Physik C Particles and Fields, Zeitschrift für Physik C Particles and Fields, 1996, 69, pp.183-193, Zeitschrift für Physik C Particles and Fields, Springer Verlag, 1996, 69, pp.183-193
Accession number :
edsair.doi.dedup.....b98e0769ea46893bc1fad24cb0dcc15d